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gcc/libatomic/auto-config.h.in
Victor Do Nascimento f6b9a064a2 Libatomic: AArch64: Convert all lse128 assembly to .insn directives 
Given the lack of support for the LSE128 instructions in all but the
the most up-to-date version of Binutils (2.42), having the build-time
test for assembler support for these instructions often leads to the
building of Libatomic without support for LSE128-dependent atomic
function implementations.  This ultimately leads to different people
having different versions of Libatomic on their machines, depending on
which assembler was available at compilation time.

Furthermore, the conditional inclusion of these atomic function
implementations predicated on assembler support leads to a series of
`#if HAVE_FEAT_LSE128' guards scattered throughout the codebase and
the need for a series of aliases when the feature flag evaluates
to false.  The preprocessor macro guards, together with the
conditional aliasing leads to code that is cumbersome to understand
and maintain.

Both of the issues highlighted above will only get worse with the
coming support for LRCPC3 atomics which under the current scheme will
also require build-time checks.

Consequently, a better option for both consistency across builds and
code cleanness is to make recourse to the `.inst' directive.  By
replacing all novel assembly instructions for their hexadecimal
representation within `.inst's, we ensure that the Libatomic code is
both considerably cleaner and all machines build the same binary,
irrespective of binutils version available at compile time.

This patch therefore removes all configure checks for LSE128-support
in the assembler and all the guards and aliases that were associated
with `HAVE_FEAT_LSE128'

libatomic/ChangeLog:

	* acinclude.m4 (LIBAT_TEST_FEAT_AARCH64_LSE128): Delete.
	* auto-config.h.in (HAVE_FEAT_LSE128): Likewise
	* config/linux/aarch64/atomic_16.S: Replace all LSE128
	instructions with equivalent `.inst' directives.
	(HAVE_FEAT_LSE128): Remove all references.
	* configure: Regenerate.
	* configure.ac: Remove call to LIBAT_TEST_FEAT_AARCH64_LSE128.
2024-06-12 10:23:38 +01:00

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/* auto-config.h.in. Generated from configure.ac by autoheader. */
/* Define if building universal (internal helper macro) */
#undef AC_APPLE_UNIVERSAL_BUILD
/* Have __atomic_compare_exchange for 1 byte integers. */
#undef HAVE_ATOMIC_CAS_1
/* Have __atomic_compare_exchange for 16 byte integers. */
#undef HAVE_ATOMIC_CAS_16
/* Have __atomic_compare_exchange for 2 byte integers. */
#undef HAVE_ATOMIC_CAS_2
/* Have __atomic_compare_exchange for 4 byte integers. */
#undef HAVE_ATOMIC_CAS_4
/* Have __atomic_compare_exchange for 8 byte integers. */
#undef HAVE_ATOMIC_CAS_8
/* Have __atomic_exchange for 1 byte integers. */
#undef HAVE_ATOMIC_EXCHANGE_1
/* Have __atomic_exchange for 16 byte integers. */
#undef HAVE_ATOMIC_EXCHANGE_16
/* Have __atomic_exchange for 2 byte integers. */
#undef HAVE_ATOMIC_EXCHANGE_2
/* Have __atomic_exchange for 4 byte integers. */
#undef HAVE_ATOMIC_EXCHANGE_4
/* Have __atomic_exchange for 8 byte integers. */
#undef HAVE_ATOMIC_EXCHANGE_8
/* Have __atomic_fetch_add for 1 byte integers. */
#undef HAVE_ATOMIC_FETCH_ADD_1
/* Have __atomic_fetch_add for 16 byte integers. */
#undef HAVE_ATOMIC_FETCH_ADD_16
/* Have __atomic_fetch_add for 2 byte integers. */
#undef HAVE_ATOMIC_FETCH_ADD_2
/* Have __atomic_fetch_add for 4 byte integers. */
#undef HAVE_ATOMIC_FETCH_ADD_4
/* Have __atomic_fetch_add for 8 byte integers. */
#undef HAVE_ATOMIC_FETCH_ADD_8
/* Have __atomic_fetch_op for all op for 1 byte integers. */
#undef HAVE_ATOMIC_FETCH_OP_1
/* Have __atomic_fetch_op for all op for 16 byte integers. */
#undef HAVE_ATOMIC_FETCH_OP_16
/* Have __atomic_fetch_op for all op for 2 byte integers. */
#undef HAVE_ATOMIC_FETCH_OP_2
/* Have __atomic_fetch_op for all op for 4 byte integers. */
#undef HAVE_ATOMIC_FETCH_OP_4
/* Have __atomic_fetch_op for all op for 8 byte integers. */
#undef HAVE_ATOMIC_FETCH_OP_8
/* Have __atomic_load/store for 1 byte integers. */
#undef HAVE_ATOMIC_LDST_1
/* Have __atomic_load/store for 16 byte integers. */
#undef HAVE_ATOMIC_LDST_16
/* Have __atomic_load/store for 2 byte integers. */
#undef HAVE_ATOMIC_LDST_2
/* Have __atomic_load/store for 4 byte integers. */
#undef HAVE_ATOMIC_LDST_4
/* Have __atomic_load/store for 8 byte integers. */
#undef HAVE_ATOMIC_LDST_8
/* Have __atomic_test_and_set for 1 byte integers. */
#undef HAVE_ATOMIC_TAS_1
/* Have __atomic_test_and_set for 16 byte integers. */
#undef HAVE_ATOMIC_TAS_16
/* Have __atomic_test_and_set for 2 byte integers. */
#undef HAVE_ATOMIC_TAS_2
/* Have __atomic_test_and_set for 4 byte integers. */
#undef HAVE_ATOMIC_TAS_4
/* Have __atomic_test_and_set for 8 byte integers. */
#undef HAVE_ATOMIC_TAS_8
/* Define to 1 if the target supports __attribute__((alias(...))). */
#undef HAVE_ATTRIBUTE_ALIAS
/* Define to 1 if the target supports __attribute__((dllexport)). */
#undef HAVE_ATTRIBUTE_DLLEXPORT
/* Define to 1 if the target supports __attribute__((visibility(...))). */
#undef HAVE_ATTRIBUTE_VISIBILITY
/* Define to 1 if you have the <dlfcn.h> header file. */
#undef HAVE_DLFCN_H
/* Define to 1 if you have the <fenv.h> header file. */
#undef HAVE_FENV_H
/* Define to 1 if the target supports __attribute__((ifunc(...))). */
#undef HAVE_IFUNC
/* Have support for 1 byte integers. */
#undef HAVE_INT1
/* Have support for 16 byte integers. */
#undef HAVE_INT16
/* Have support for 2 byte integers. */
#undef HAVE_INT2
/* Have support for 4 byte integers. */
#undef HAVE_INT4
/* Have support for 8 byte integers. */
#undef HAVE_INT8
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H
/* Define to 1 if you have the <stdlib.h> header file. */
#undef HAVE_STDLIB_H
/* Define to 1 if you have the <strings.h> header file. */
#undef HAVE_STRINGS_H
/* Define to 1 if you have the <string.h> header file. */
#undef HAVE_STRING_H
/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H
/* Define to 1 if you have the <sys/types.h> header file. */
#undef HAVE_SYS_TYPES_H
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H
/* Define ifunc resolver function argument. */
#undef IFUNC_RESOLVER_ARGS
/* Define to 1 if GNU symbol versioning is used for libatomic. */
#undef LIBAT_GNU_SYMBOL_VERSIONING
/* Define to the sub-directory in which libtool stores uninstalled libraries.
*/
#undef LT_OBJDIR
/* Name of package */
#undef PACKAGE
/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT
/* Define to the full name of this package. */
#undef PACKAGE_NAME
/* Define to the full name and version of this package. */
#undef PACKAGE_STRING
/* Define to the one symbol short name of this package. */
#undef PACKAGE_TARNAME
/* Define to the home page for this package. */
#undef PACKAGE_URL
/* Define to the version of this package. */
#undef PACKAGE_VERSION
/* The size of `char', as computed by sizeof. */
#undef SIZEOF_CHAR
/* The size of `int', as computed by sizeof. */
#undef SIZEOF_INT
/* The size of `long', as computed by sizeof. */
#undef SIZEOF_LONG
/* The size of `short', as computed by sizeof. */
#undef SIZEOF_SHORT
/* The size of `void *', as computed by sizeof. */
#undef SIZEOF_VOID_P
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
/* Define if you can safely include both <string.h> and <strings.h>. */
#undef STRING_WITH_STRINGS
/* Version number of package */
#undef VERSION
/* The word size in bytes of the machine. */
#undef WORDSIZE
/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
significant byte first (like Motorola and SPARC, unlike Intel). */
#if defined AC_APPLE_UNIVERSAL_BUILD
# if defined __BIG_ENDIAN__
# define WORDS_BIGENDIAN 1
# endif
#else
# ifndef WORDS_BIGENDIAN
# undef WORDS_BIGENDIAN
# endif
#endif
#define MAYBE_HAVE_ATOMIC_LDST_1 HAVE_ATOMIC_LDST_1
#define FAST_ATOMIC_LDST_16 HAVE_ATOMIC_LDST_16
#define MAYBE_HAVE_ATOMIC_TAS_1 HAVE_ATOMIC_TAS_1
#define MAYBE_HAVE_ATOMIC_TAS_2 HAVE_ATOMIC_TAS_2
#define MAYBE_HAVE_ATOMIC_TAS_4 HAVE_ATOMIC_TAS_4
#define MAYBE_HAVE_ATOMIC_TAS_8 HAVE_ATOMIC_TAS_8
#define MAYBE_HAVE_ATOMIC_TAS_16 HAVE_ATOMIC_TAS_16
#define MAYBE_HAVE_ATOMIC_EXCHANGE_1 HAVE_ATOMIC_EXCHANGE_1
#define MAYBE_HAVE_ATOMIC_EXCHANGE_2 HAVE_ATOMIC_EXCHANGE_2
#define MAYBE_HAVE_ATOMIC_EXCHANGE_4 HAVE_ATOMIC_EXCHANGE_4
#define MAYBE_HAVE_ATOMIC_EXCHANGE_8 HAVE_ATOMIC_EXCHANGE_8
#define FAST_ATOMIC_LDST_1 HAVE_ATOMIC_LDST_1
#define MAYBE_HAVE_ATOMIC_EXCHANGE_16 HAVE_ATOMIC_EXCHANGE_16
#define MAYBE_HAVE_ATOMIC_CAS_1 HAVE_ATOMIC_CAS_1
#define MAYBE_HAVE_ATOMIC_CAS_2 HAVE_ATOMIC_CAS_2
#define MAYBE_HAVE_ATOMIC_CAS_4 HAVE_ATOMIC_CAS_4
#define MAYBE_HAVE_ATOMIC_CAS_8 HAVE_ATOMIC_CAS_8
#define MAYBE_HAVE_ATOMIC_CAS_16 HAVE_ATOMIC_CAS_16
#define MAYBE_HAVE_ATOMIC_FETCH_ADD_1 HAVE_ATOMIC_FETCH_ADD_1
#define MAYBE_HAVE_ATOMIC_FETCH_ADD_2 HAVE_ATOMIC_FETCH_ADD_2
#define MAYBE_HAVE_ATOMIC_FETCH_ADD_4 HAVE_ATOMIC_FETCH_ADD_4
#define MAYBE_HAVE_ATOMIC_FETCH_ADD_8 HAVE_ATOMIC_FETCH_ADD_8
#define MAYBE_HAVE_ATOMIC_LDST_2 HAVE_ATOMIC_LDST_2
#define MAYBE_HAVE_ATOMIC_FETCH_ADD_16 HAVE_ATOMIC_FETCH_ADD_16
#define MAYBE_HAVE_ATOMIC_FETCH_OP_1 HAVE_ATOMIC_FETCH_OP_1
#define MAYBE_HAVE_ATOMIC_FETCH_OP_2 HAVE_ATOMIC_FETCH_OP_2
#define MAYBE_HAVE_ATOMIC_FETCH_OP_4 HAVE_ATOMIC_FETCH_OP_4
#define MAYBE_HAVE_ATOMIC_FETCH_OP_8 HAVE_ATOMIC_FETCH_OP_8
#define MAYBE_HAVE_ATOMIC_FETCH_OP_16 HAVE_ATOMIC_FETCH_OP_16
#ifndef WORDS_BIGENDIAN
#define WORDS_BIGENDIAN 0
#endif
#define FAST_ATOMIC_LDST_2 HAVE_ATOMIC_LDST_2
#define MAYBE_HAVE_ATOMIC_LDST_4 HAVE_ATOMIC_LDST_4
#define FAST_ATOMIC_LDST_4 HAVE_ATOMIC_LDST_4
#define MAYBE_HAVE_ATOMIC_LDST_8 HAVE_ATOMIC_LDST_8
#define FAST_ATOMIC_LDST_8 HAVE_ATOMIC_LDST_8
#define MAYBE_HAVE_ATOMIC_LDST_16 HAVE_ATOMIC_LDST_16
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